Class TimeSeriesDelta

  • All Implemented Interfaces:
    java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, UnsupervisedFilter

    public class TimeSeriesDelta
    extends TimeSeriesTranslate
    An instance filter that assumes instances form time-series data and replaces attribute values in the current instance with the difference between the current value and the equivalent attribute attribute value of some previous (or future) instance. For instances where the time-shifted value is unknown either the instance may be dropped, or missing values used. Skips the class attribute if it is set.

    Valid options are:

     -R <index1,index2-index4,...>
      Specify list of columns to translate in time. First and
      last are valid indexes. (default none)
     -V
      Invert matching sense (i.e. calculate for all non-specified columns)
     -I <num>
      The number of instances forward to translate values
      between. A negative number indicates taking values from
      a past instance. (default -1)
     -M
      For instances at the beginning or end of the dataset where
      the translated values are not known, remove those instances
      (default is to use missing values).
    Version:
    $Revision: 5547 $
    Author:
    Len Trigg (trigg@cs.waikato.ac.nz)
    See Also:
    Serialized Form
    • Constructor Detail

      • TimeSeriesDelta

        public TimeSeriesDelta()
    • Method Detail

      • globalInfo

        public java.lang.String globalInfo()
        Returns a string describing this classifier
        Overrides:
        globalInfo in class TimeSeriesTranslate
        Returns:
        a description of the classifier suitable for displaying in the explorer/experimenter gui
      • setInputFormat

        public boolean setInputFormat​(Instances instanceInfo)
                               throws java.lang.Exception
        Sets the format of the input instances.
        Overrides:
        setInputFormat in class TimeSeriesTranslate
        Parameters:
        instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).
        Returns:
        true if the outputFormat may be collected immediately
        Throws:
        UnsupportedAttributeTypeException - if selected attributes are not numeric.
        java.lang.Exception - if the format couldn't be set successfully
      • main

        public static void main​(java.lang.String[] argv)
        Main method for testing this class.
        Parameters:
        argv - should contain arguments to the filter: use -h for help